Malicious PDF — malware analysis report

Static analysis result for SHA-256 1fc51dc091aa5256…

MALICIOUS

PDF

51.5 KB Created: 2020-08-05 10:21:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: a99536b90f09ec93e247dd85b6ba9296 SHA-1: a25f322bffffea4625012598ecc9c5f0b407c5a5 SHA-256: 1fc51dc091aa52562909c2cd15ca119ccdc513b4e6a70d9d5297e8fb871908d4
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a mass external PDF link farm, with many links pointing to shopify.com, but the primary malicious indicator is a link to the ttraff.ru redirector. This suggests the document is designed to redirect users to malicious infrastructure, likely for further exploitation or phishing. No scripts were extracted, and the document body is heavily obfuscated, but the presence of the malicious redirector is a strong indicator of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.ru/pify?keyword=estudio+descriptivo+sampieri+pdf In PDF document text
    • http://files.mrsnishita.com/uploads/1/3/0/9/130969461/64b628850036.pdfIn PDF document text
    • http://files.isivirginia.com/uploads/1/3/1/4/131453284/2839bb.pdfIn PDF document text
    • http://files.thehoneybeefactory.net/uploads/1/3/1/3/131398401/vonukuzik.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0440/9245/7112/files/manual_drip_coffeemaker.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5584/8355/files/gifiwebaso.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2379/4339/files/mosuduxim.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4659/2924/files/55361511644.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2119/5688/files/sesopite.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0895/8362/files/wutanemozatiga.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/0726/1341/files/blackfathom_deeps_map.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/9247/4011/files/39478321081.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2834/9079/files/sokesirakuzur.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/6735074847.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8702/6581/files/wowirotubetug.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Related samples 4

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007cb5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7CB5 5060 bytes
SHA-256: c737b5a659cd5eb55b40af5a72600f64ff6cca4f6315de5b85c189ed5fdd75ba
font_01_sfnt_off00008df4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8DF4 10916 bytes
SHA-256: ea04232922280fd66a18bcfe0e6b6928d287d2498ad7543047449f8400b0b397
font_02_sfnt_off0000b18d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB18D 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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